drivers/sound/gus

/* */
This source file includes following definitions.
reset_sample_memory
gus_delay
gus_poke
gus_peek
gus_write8
gus_read8
gus_look8
gus_write16
gus_read16
gus_write_addr
gus_select_voice
gus_select_max_voices
gus_voice_on
gus_voice_off
gus_voice_mode
gus_voice_freq
gus_voice_volume
gus_voice_balance
gus_ramp_range
gus_ramp_rate
gus_rampon
gus_ramp_mode
gus_rampoff
gus_voice_init
step_envelope
init_envelope
start_release
gus_voice_fade
gus_reset
gus_initialize
gus_wave_detect
guswave_ioctl
guswave_set_instr
guswave_kill_note
guswave_aftertouch
guswave_panning
compute_volume
compute_and_set_volume
dynamic_volume_change
guswave_controller
guswave_start_note
guswave_reset
guswave_open
guswave_close
guswave_load_patch
guswave_hw_control
gus_sampling_set_speed
gus_sampling_set_channels
gus_sampling_set_bits
gus_sampling_ioctl
gus_sampling_reset
gus_sampling_open
gus_sampling_close
play_next_pcm_block
gus_transfer_output_block
gus_sampling_output_block
gus_sampling_start_input
gus_sampling_prepare_for_input
gus_sampling_prepare_for_output
gus_has_output_drained
gus_copy_from_user
guswave_patchmgr
gus_wave_init
do_loop_irq
do_volume_irq
gus_voice_irq
guswave_dma_irq
   1 
   2 /*
   3  * linux/kernel/chr_drv/sound/gus_wave.c
   4  * 
   5  * Driver for the Gravis UltraSound wave table synth.
   6  * 
   7  * Copyright by Hannu Savolainen 1993
   8  * 
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are
  11  * met: 1. Redistributions of source code must retain the above copyright
  12  * notice, this list of conditions and the following disclaimer. 2.
  13  * Redistributions in binary form must reproduce the above copyright notice,
  14  * this list of conditions and the following disclaimer in the documentation
  15  * and/or other materials provided with the distribution.
  16  * 
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  24  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  * 
  29  */
  30 
  31 /* #define GUS_LINEAR_VOLUME     */
  32 
  33 #include "sound_config.h"
  34 #include "ultrasound.h"
  35 #include "gus_hw.h"
  36 
  37 #if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_GUS)
  38 
  39 #define MAX_SAMPLE      256
  40 #define MAX_PATCH       256
  41 
  42 struct voice_info
  43   {
  44     unsigned long   orig_freq;
  45     unsigned long   current_freq;
  46     unsigned long   mode;
  47     int             bender;
  48     int             bender_range;
  49     int             panning;
  50     int             midi_volume;
  51     unsigned int    initial_volume;
  52     unsigned int    current_volume;
  53     int             loop_irq_mode, loop_irq_parm;
  54 #define LMODE_FINISH            1
  55 #define LMODE_PCM               2
  56 #define LMODE_PCM_STOP          3
  57     int             volume_irq_mode, volume_irq_parm;
  58 #define VMODE_HALT              1
  59 #define VMODE_ENVELOPE          2
  60 
  61     int             env_phase;
  62     unsigned char   env_rate[6];
  63     unsigned char   env_offset[6];
  64 
  65     /*
  66      * Volume computation parameters for gus_adagio_vol()
  67      */
  68     int             main_vol, expression_vol, patch_vol;
  69 
  70   };
  71 
  72 extern int      gus_base;
  73 extern int      gus_irq, gus_dma;
  74 extern char    *snd_raw_buf[MAX_DSP_DEV][DSP_BUFFCOUNT];
  75 extern unsigned long snd_raw_buf_phys[MAX_DSP_DEV][DSP_BUFFCOUNT];
  76 extern int      snd_raw_count[MAX_DSP_DEV];
  77 static long     gus_mem_size = 0;
  78 static long     free_mem_ptr = 0;
  79 static int      gus_busy = 0;
  80 static int      nr_voices = 0;  /* Number of currently allowed voices */
  81 static int      gus_devnum = 0;
  82 static int      volume_base, volume_scale, volume_method;
  83 
  84 #define VOL_METHOD_ADAGIO       1
  85 int             gus_wave_volume = 60;   /* Master wolume for wave (0 to 100) */
  86 static unsigned char mix_image = 0x00;
  87 
  88 /*
  89  * Current version of this_one driver doesn't allow synth and PCM functions
  90  * at the same time. The active_device specifies the active driver
  91  */
  92 static int      active_device = 0;
  93 
  94 #define GUS_DEV_WAVE            1       /* Wave table synth */
  95 #define GUS_DEV_PCM_DONE        2       /* PCM device, transfer done */
  96 #define GUS_DEV_PCM_CONTINUE    3       /* PCM device, transfer the second
  97                                          * chn */
  98 
  99 static int      gus_sampling_speed;
 100 static int      gus_sampling_channels;
 101 static int      gus_sampling_bits;
 102 
 103 DEFINE_WAIT_QUEUE (dram_sleeper, dram_sleep_flag);
 104 
 105 /*
 106  * Variables and buffers for PCM output
 107  */
 108 #define MAX_PCM_BUFFERS         (32*MAX_REALTIME_FACTOR) /* Don't change */
 109 
 110 static int      pcm_bsize,      /* Current blocksize */
 111                 pcm_nblk,       /* Current # of blocks */
 112                 pcm_banksize;   /* # bytes allocated for channels */
 113 static int      pcm_datasize[MAX_PCM_BUFFERS];  /* Actual # of bytes in blk */
 114 static volatile int pcm_head, pcm_tail, pcm_qlen;       /* DRAM queue */
 115 static volatile int pcm_active;
 116 static int      pcm_current_dev;
 117 static int      pcm_current_block;
 118 static unsigned long pcm_current_buf;
 119 static int      pcm_current_count;
 120 static int      pcm_current_intrflag;
 121 
 122 struct voice_info voices[32];
 123 
 124 static int      freq_div_table[] =
 125 {
 126   44100,                        /* 14 */
 127   41160,                        /* 15 */
 128   38587,                        /* 16 */
 129   36317,                        /* 17 */
 130   34300,                        /* 18 */
 131   32494,                        /* 19 */
 132   30870,                        /* 20 */
 133   29400,                        /* 21 */
 134   28063,                        /* 22 */
 135   26843,                        /* 23 */
 136   25725,                        /* 24 */
 137   24696,                        /* 25 */
 138   23746,                        /* 26 */
 139   22866,                        /* 27 */
 140   22050,                        /* 28 */
 141   21289,                        /* 29 */
 142   20580,                        /* 30 */
 143   19916,                        /* 31 */
 144   19293                         /* 32 */
 145 };
 146 
 147 static struct patch_info samples[MAX_SAMPLE + 1];
 148 static long     sample_ptrs[MAX_SAMPLE + 1];
 149 static int      sample_map[32];
 150 static int      free_sample;
 151 
 152 
 153 static int      patch_table[MAX_PATCH];
 154 static int      patch_map[32];
 155 
 156 static struct synth_info gus_info =
 157 {"Gravis UltraSound", 0, SYNTH_TYPE_SAMPLE, SAMPLE_TYPE_GUS, 0, 16, 0, MAX_PATCH};
 158 
 159 static void     gus_poke (long addr, unsigned char data);
 160 static void     compute_and_set_volume (int voice, int volume, int ramp_time);
 161 extern unsigned short gus_adagio_vol (int vel, int mainv, int xpn, int voicev);
 162 static void     compute_volume (int voice, int volume);
 163 
 164 #define INSTANT_RAMP            -1      /* Dont use ramping */
 165 #define FAST_RAMP               0       /* Fastest possible ramp */
 166 
 167 static void
 168 reset_sample_memory (void)
     /*  */
 169 {
 170   int             i;
 171 
 172   for (i = 0; i <= MAX_SAMPLE; i++)
 173     sample_ptrs[i] = -1;
 174   for (i = 0; i < 32; i++)
 175     sample_map[i] = -1;
 176   for (i = 0; i < 32; i++)
 177     patch_map[i] = -1;
 178 
 179   gus_poke (0, 0);              /* Put silence here */
 180   gus_poke (1, 0);
 181 
 182   free_mem_ptr = 2;
 183   free_sample = 0;
 184 
 185   for (i = 0; i < MAX_PATCH; i++)
 186     patch_table[i] = -1;
 187 }
 188 
 189 void
 190 gus_delay (void)
     /*  */
 191 {
 192   int             i;
 193 
 194   for (i = 0; i < 7; i++)
 195     INB (u_DRAMIO);
 196 }
 197 
 198 static void
 199 gus_poke (long addr, unsigned char data)
     /*  */
 200 {
 201   unsigned long   flags;
 202 
 203   DISABLE_INTR (flags);
 204   OUTB (0x43, u_Command);
 205   OUTB (addr & 0xff, u_DataLo);
 206   OUTB ((addr >> 8) & 0xff, u_DataHi);
 207 
 208   OUTB (0x44, u_Command);
 209   OUTB ((addr >> 16) & 0xff, u_DataHi);
 210   OUTB (data, u_DRAMIO);
 211   RESTORE_INTR (flags);
 212 }
 213 
 214 static unsigned char
 215 gus_peek (long addr)
     /*  */
 216 {
 217   unsigned long   flags;
 218   unsigned char   tmp;
 219 
 220   DISABLE_INTR (flags);
 221   OUTB (0x43, u_Command);
 222   OUTB (addr & 0xff, u_DataLo);
 223   OUTB ((addr >> 8) & 0xff, u_DataHi);
 224 
 225   OUTB (0x44, u_Command);
 226   OUTB ((addr >> 16) & 0xff, u_DataHi);
 227   tmp = INB (u_DRAMIO);
 228   RESTORE_INTR (flags);
 229 
 230   return tmp;
 231 }
 232 
 233 void
 234 gus_write8 (int reg, unsigned char data)
     /*  */
 235 {
 236   unsigned long   flags;
 237 
 238   DISABLE_INTR (flags);
 239 
 240   OUTB (reg, u_Command);
 241   OUTB (data, u_DataHi);
 242 
 243   RESTORE_INTR (flags);
 244 }
 245 
 246 unsigned char
 247 gus_read8 (int reg)
     /*  */
 248 {
 249   unsigned long   flags;
 250   unsigned char   val;
 251 
 252   DISABLE_INTR (flags);
 253   OUTB (reg | 0x80, u_Command);
 254   val = INB (u_DataHi);
 255   RESTORE_INTR (flags);
 256 
 257   return val;
 258 }
 259 
 260 unsigned char
 261 gus_look8 (int reg)
     /*  */
 262 {
 263   unsigned long   flags;
 264   unsigned char   val;
 265 
 266   DISABLE_INTR (flags);
 267   OUTB (reg, u_Command);
 268   val = INB (u_DataHi);
 269   RESTORE_INTR (flags);
 270 
 271   return val;
 272 }
 273 
 274 void
 275 gus_write16 (int reg, unsigned short data)
     /*  */
 276 {
 277   unsigned long   flags;
 278 
 279   DISABLE_INTR (flags);
 280 
 281   OUTB (reg, u_Command);
 282 
 283   OUTB (data & 0xff, u_DataLo);
 284   OUTB ((data >> 8) & 0xff, u_DataHi);
 285 
 286   RESTORE_INTR (flags);
 287 }
 288 
 289 unsigned short
 290 gus_read16 (int reg)
     /*  */
 291 {
 292   unsigned long   flags;
 293   unsigned char   hi, lo;
 294 
 295   DISABLE_INTR (flags);
 296 
 297   OUTB (reg | 0x80, u_Command);
 298 
 299   lo = INB (u_DataLo);
 300   hi = INB (u_DataHi);
 301 
 302   RESTORE_INTR (flags);
 303 
 304   return ((hi << 8) & 0xff00) | lo;
 305 }
 306 
 307 void
 308 gus_write_addr (int reg, unsigned long address, int is16bit)
     /*  */
 309 {
 310   unsigned long   hold_address;
 311 
 312   if (is16bit)
 313     {
 314       /*
 315        * Special processing required for 16 bit patches
 316        */
 317 
 318       hold_address = address;
 319       address = address >> 1;
 320       address &= 0x0001ffffL;
 321       address |= (hold_address & 0x000c0000L);
 322     }
 323 
 324   gus_write16 (reg, (unsigned short) ((address >> 7) & 0xffff));
 325   gus_write16 (reg + 1, (unsigned short) ((address << 9) & 0xffff));
 326 }
 327 
 328 static void
 329 gus_select_voice (int voice)
     /*  */
 330 {
 331   if (voice < 0 || voice > 31)
 332     return;
 333 
 334   OUTB (voice, u_Voice);
 335 }
 336 
 337 static void
 338 gus_select_max_voices (int nvoices)
     /*  */
 339 {
 340   if (nvoices < 14)
 341     nvoices = 14;
 342   if (nvoices > 32)
 343     nvoices = 32;
 344 
 345   nr_voices = nvoices;
 346 
 347   gus_write8 (0x0e, (nvoices - 1) | 0xc0);
 348 }
 349 
 350 static void
 351 gus_voice_on (unsigned char mode)
     /*  */
 352 {
 353   gus_write8 (0x00, mode & 0xfc);
 354   gus_delay ();
 355   gus_write8 (0x00, mode & 0xfc);
 356 }
 357 
 358 static void
 359 gus_voice_off (void)
     /*  */
 360 {
 361   gus_write8 (0x00, gus_read8 (0x00) | 0x03);
 362 }
 363 
 364 static void
 365 gus_voice_mode (unsigned char mode)
     /*  */
 366 {
 367   gus_write8 (0x00, (gus_read8 (0x00) & 0x03) | (mode & 0xfc)); /* Don't start or stop
 368                                                                  * voice */
 369   gus_delay ();
 370   gus_write8 (0x00, (gus_read8 (0x00) & 0x03) | (mode & 0xfc));
 371 }
 372 
 373 static void
 374 gus_voice_freq (unsigned long freq)
     /*  */
 375 {
 376   unsigned long   divisor = freq_div_table[nr_voices - 14];
 377   unsigned short  fc;
 378 
 379   fc = (unsigned short) (((freq << 9) + (divisor >> 1)) / divisor);
 380   fc = fc << 1;
 381 
 382   gus_write16 (0x01, fc);
 383 }
 384 
 385 static void
 386 gus_voice_volume (unsigned short vol)
     /*  */
 387 {
 388   gus_write8 (0x0d, 0x03);      /* Stop ramp before setting volume */
 389   gus_write16 (0x09, vol << 4);
 390 }
 391 
 392 static void
 393 gus_voice_balance (unsigned char balance)
     /*  */
 394 {
 395   gus_write8 (0x0c, balance);
 396 }
 397 
 398 static void
 399 gus_ramp_range (unsigned short low, unsigned short high)
     /*  */
 400 {
 401   gus_write8 (0x07, (low >> 4) & 0xff);
 402   gus_write8 (0x08, (high >> 4) & 0xff);
 403 }
 404 
 405 static void
 406 gus_ramp_rate (unsigned char scale, unsigned char rate)
     /*  */
 407 {
 408   gus_write8 (0x06, ((scale & 0x03) << 6) | (rate & 0x3f));
 409 }
 410 
 411 static void
 412 gus_rampon (unsigned char mode)
     /*  */
 413 {
 414   gus_write8 (0x0d, mode & 0xfc);
 415   gus_delay ();
 416   gus_write8 (0x0d, mode & 0xfc);
 417 }
 418 
 419 static void
 420 gus_ramp_mode (unsigned char mode)
     /*  */
 421 {
 422   gus_write8 (0x0d, (gus_read8 (0x0d) & 0x03) | (mode & 0xfc)); /* Don't start or stop
 423                                                                  * ramping */
 424   gus_delay ();
 425   gus_write8 (0x0d, (gus_read8 (0x0d) & 0x03) | (mode & 0xfc));
 426 }
 427 
 428 static void
 429 gus_rampoff (void)
     /*  */
 430 {
 431   gus_write8 (0x0d, 0x03);
 432 }
 433 
 434 static void
 435 gus_voice_init (int voice)
     /*  */
 436 {
 437   unsigned long   flags;
 438 
 439   DISABLE_INTR (flags);
 440   gus_select_voice (voice);
 441   gus_voice_volume (0);
 442   gus_write_addr (0x0a, 0, 0);  /* Set current position to 0 */
 443   gus_write8 (0x00, 0x03);      /* Voice off */
 444   gus_write8 (0x0d, 0x03);      /* Ramping off */
 445   RESTORE_INTR (flags);
 446 
 447   voices[voice].panning = 0;
 448   voices[voice].mode = 0;
 449   voices[voice].orig_freq = 20000;
 450   voices[voice].current_freq = 20000;
 451   voices[voice].bender = 0;
 452   voices[voice].bender_range = 200;
 453   voices[voice].initial_volume = 0;
 454   voices[voice].current_volume = 0;
 455   voices[voice].loop_irq_mode = 0;
 456   voices[voice].loop_irq_parm = 0;
 457   voices[voice].volume_irq_mode = 0;
 458   voices[voice].volume_irq_parm = 0;
 459   voices[voice].env_phase = 0;
 460   voices[voice].main_vol = 127;
 461   voices[voice].patch_vol = 127;
 462   voices[voice].expression_vol = 127;
 463 }
 464 
 465 static void
 466 step_envelope (int voice)
     /*  */
 467 {
 468   unsigned        vol, prev_vol, phase;
 469   unsigned char   rate;
 470 
 471   if (voices[voice].mode & WAVE_SUSTAIN_ON && voices[voice].env_phase == 2)
 472     {
 473       gus_rampoff ();
 474       return;                   /* Sustain */
 475     }
 476 
 477   if (voices[voice].env_phase >= 5)
 478     {
 479       /*
 480        * Shoot the voice off
 481        */
 482 
 483       gus_voice_init (voice);
 484       return;
 485     }
 486 
 487   prev_vol = voices[voice].current_volume;
 488   gus_voice_volume (prev_vol);
 489   phase = ++voices[voice].env_phase;
 490 
 491   compute_volume (voice, voices[voice].midi_volume);
 492 
 493   vol = voices[voice].initial_volume * voices[voice].env_offset[phase] / 255;
 494   rate = voices[voice].env_rate[phase];
 495   gus_write8 (0x06, rate);      /* Ramping rate */
 496 
 497   voices[voice].volume_irq_mode = VMODE_ENVELOPE;
 498 
 499   if (((vol - prev_vol) / 64) == 0)     /* No significant volume change */
 500     {
 501       step_envelope (voice);    /* Continue with the next phase */
 502       return;
 503     }
 504 
 505   if (vol > prev_vol)
 506     {
 507       if (vol >= (4096 - 64))
 508         vol = 4096 - 65;
 509       gus_ramp_range (0, vol);
 510       gus_rampon (0x20);        /* Increasing, irq */
 511     }
 512   else
 513     {
 514       if (vol <= 64)
 515         vol = 65;
 516       gus_ramp_range (vol, 4095);
 517       gus_rampon (0x60);        /* Decreasing, irq */
 518     }
 519   voices[voice].current_volume = vol;
 520 }
 521 
 522 static void
 523 init_envelope (int voice)
     /*  */
 524 {
 525   voices[voice].env_phase = -1;
 526   voices[voice].current_volume = 64;
 527 
 528   step_envelope (voice);
 529 }
 530 
 531 static void
 532 start_release (int voice)
     /*  */
 533 {
 534   if (gus_read8 (0x00) & 0x03)
 535     return;                     /* Voice already stopped */
 536 
 537   voices[voice].env_phase = 2;  /* Will be incremented by step_envelope */
 538 
 539   voices[voice].current_volume =
 540     voices[voice].initial_volume =
 541     gus_read16 (0x09) >> 4;     /* Get current volume */
 542 
 543   voices[voice].mode &= ~WAVE_SUSTAIN_ON;
 544   gus_rampoff ();
 545   step_envelope (voice);
 546 }
 547 
 548 static void
 549 gus_voice_fade (int voice)
     /*  */
 550 {
 551   int             instr_no = sample_map[voice], is16bits;
 552 
 553   if (instr_no < 0 || instr_no > MAX_SAMPLE)
 554     {
 555       gus_write8 (0x00, 0x03);  /* Hard stop */
 556       return;
 557     }
 558 
 559   is16bits = (samples[instr_no].mode & WAVE_16_BITS) ? 1 : 0;   /* 8 or 16 bit samples */
 560 
 561   if (voices[voice].mode & WAVE_ENVELOPES)
 562     {
 563       start_release (voice);
 564       return;
 565     }
 566 
 567   /*
 568    * Ramp the volume down but not too quickly.
 569    */
 570   if ((gus_read16 (0x09) >> 4) < 100)   /* Get current volume */
 571     {
 572       gus_voice_off ();
 573       gus_rampoff ();
 574       gus_voice_init (voice);
 575       return;
 576     }
 577 
 578   gus_ramp_range (65, 4095);
 579   gus_ramp_rate (2, 4);
 580   gus_rampon (0x40 | 0x20);     /* Down, once, irq */
 581   voices[voice].volume_irq_mode = VMODE_HALT;
 582 }
 583 
 584 static void
 585 gus_reset (void)
     /*  */
 586 {
 587   int             i;
 588 
 589   gus_select_max_voices (24);
 590   volume_base = 3071;
 591   volume_scale = 4;
 592   volume_method = VOL_METHOD_ADAGIO;
 593 
 594   for (i = 0; i < 32; i++)
 595     {
 596       gus_voice_init (i);       /* Turn voice off */
 597     }
 598 
 599   INB (u_Status);               /* Touch the status register */
 600 
 601   gus_look8 (0x41);             /* Clear any pending DMA IRQs */
 602   gus_look8 (0x49);             /* Clear any pending sample IRQs */
 603   gus_read8 (0x0f);             /* Clear pending IRQs */
 604 
 605 }
 606 
 607 static void
 608 gus_initialize (void)
     /*  */
 609 {
 610   unsigned long   flags;
 611   unsigned char   dma_image, irq_image, tmp;
 612 
 613   static unsigned char gus_irq_map[16] =
 614   {0, 0, 1, 3, 0, 2, 0, 4, 0, 0, 0, 5, 6, 0, 0, 7};
 615 
 616   static unsigned char gus_dma_map[8] =
 617   {0, 1, 0, 2, 0, 3, 4, 5};
 618 
 619   DISABLE_INTR (flags);
 620 
 621   gus_write8 (0x4c, 0);         /* Reset GF1 */
 622   gus_delay ();
 623   gus_delay ();
 624 
 625   gus_write8 (0x4c, 1);         /* Release Reset */
 626   gus_delay ();
 627   gus_delay ();
 628 
 629   /*
 630    * Clear all interrupts
 631    */
 632 
 633   gus_write8 (0x41, 0);         /* DMA control */
 634   gus_write8 (0x45, 0);         /* Timer control */
 635   gus_write8 (0x49, 0);         /* Sample control */
 636 
 637   gus_select_max_voices (24);
 638 
 639   INB (u_Status);               /* Touch the status register */
 640 
 641   gus_look8 (0x41);             /* Clear any pending DMA IRQs */
 642   gus_look8 (0x49);             /* Clear any pending sample IRQs */
 643   gus_read8 (0x0f);             /* Clear pending IRQs */
 644 
 645   gus_reset ();                 /* Resets all voices */
 646 
 647   gus_look8 (0x41);             /* Clear any pending DMA IRQs */
 648   gus_look8 (0x49);             /* Clear any pending sample IRQs */
 649   gus_read8 (0x0f);             /* Clear pending IRQs */
 650 
 651   gus_write8 (0x4c, 7);         /* Master reset | DAC enable | IRQ enable */
 652 
 653   /*
 654    * Set up for Digital ASIC
 655    */
 656 
 657   OUTB (0x05, gus_base + 0x0f);
 658 
 659   mix_image |= 0x02;            /* Disable line out */
 660   OUTB (mix_image, u_Mixer);
 661 
 662   OUTB (0x00, u_IRQDMAControl);
 663 
 664   OUTB (0x00, gus_base + 0x0f);
 665 
 666   /*
 667    * Now set up the DMA and IRQ interface
 668    * 
 669    * The GUS supports two IRQs and two DMAs.
 670    * 
 671    * Just one DMA channel is used. This prevents simultaneous ADC and DAC.
 672    * Adding this support requires significant changes to the dmabuf.c, dsp.c
 673    * and audio.c also.
 674    */
 675 
 676   irq_image = 0;
 677   tmp = gus_irq_map[gus_irq];
 678   if (!tmp)
 679     printk ("Warning! GUS IRQ not selected\n");
 680   irq_image |= tmp;
 681   irq_image |= 0x40;            /* Combine IRQ1 (GF1) and IRQ2 (Midi) */
 682 
 683   dma_image = 0x40;             /* Combine DMA1 (DRAM) and IRQ2 (ADC) */
 684   tmp = gus_dma_map[gus_dma];
 685   if (!tmp)
 686     printk ("Warning! GUS DMA not selected\n");
 687   dma_image |= tmp;
 688 
 689   /*
 690    * For some reason the IRQ and DMA addresses must be written twice
 691    */
 692 
 693   /* Doing it first time */
 694 
 695   OUTB (mix_image, u_Mixer);    /* Select DMA control */
 696   OUTB (dma_image | 0x80, u_IRQDMAControl);     /* Set DMA address */
 697 
 698   OUTB (mix_image | 0x40, u_Mixer);     /* Select IRQ control */
 699   OUTB (irq_image, u_IRQDMAControl);    /* Set IRQ address */
 700 
 701   /* Doing it second time */
 702 
 703   OUTB (mix_image, u_Mixer);    /* Select DMA control */
 704   OUTB (dma_image, u_IRQDMAControl);    /* Set DMA address */
 705 
 706   OUTB (mix_image | 0x40, u_Mixer);     /* Select IRQ control */
 707   OUTB (irq_image, u_IRQDMAControl);    /* Set IRQ address */
 708 
 709   gus_select_voice (0);         /* This disables writes to IRQ/DMA reg */
 710 
 711   mix_image &= ~0x02;           /* Enable line out */
 712   mix_image |= 0x08;            /* Enable IRQ */
 713   OUTB (mix_image, u_Mixer);    /* Turn mixer channels on */
 714 
 715   gus_select_voice (0);         /* This disables writes to IRQ/DMA reg */
 716 
 717   gusintr (0);                  /* Serve pending interrupts */
 718   RESTORE_INTR (flags);
 719 }
 720 
 721 int
 722 gus_wave_detect (int baseaddr)
     /*  */
 723 {
 724   gus_base = baseaddr;
 725 
 726   gus_write8 (0x4c, 0);         /* Reset GF1 */
 727   gus_delay ();
 728   gus_delay ();
 729 
 730   gus_write8 (0x4c, 1);         /* Release Reset */
 731   gus_delay ();
 732   gus_delay ();
 733 
 734   gus_poke (0x000, 0xaa);
 735   gus_poke (0x100, 0x55);
 736 
 737   if (gus_peek (0x000) != 0xaa)
 738     return 0;
 739   if (gus_peek (0x100) != 0x55)
 740     return 0;
 741 
 742   gus_mem_size = 0x40000;       /* 256k */
 743   gus_poke (0x40000, 0xaa);
 744   if (gus_peek (0x40000) != 0xaa)
 745     return 1;
 746 
 747   gus_mem_size = 0x80000;       /* 512k */
 748   gus_poke (0x80000, 0xaa);
 749   if (gus_peek (0x80000) != 0xaa)
 750     return 1;
 751 
 752   gus_mem_size = 0xc0000;       /* 768k */
 753   gus_poke (0xc0000, 0xaa);
 754   if (gus_peek (0xc0000) != 0xaa)
 755     return 1;
 756 
 757   gus_mem_size = 0x100000;      /* 1M */
 758 
 759   return 1;
 760 }
 761 
 762 static int
 763 guswave_ioctl (int dev,
     /*  */
 764                unsigned int cmd, unsigned int arg)
 765 {
 766 
 767   switch (cmd)
 768     {
 769     case SNDCTL_SYNTH_INFO:
 770       gus_info.nr_voices = nr_voices;
 771       IOCTL_TO_USER ((char *) arg, 0, &gus_info, sizeof (gus_info));
 772       return 0;
 773       break;
 774 
 775     case SNDCTL_SEQ_RESETSAMPLES:
 776       reset_sample_memory ();
 777       return 0;
 778       break;
 779 
 780     case SNDCTL_SEQ_PERCMODE:
 781       return 0;
 782       break;
 783 
 784     case SNDCTL_SYNTH_MEMAVL:
 785       return gus_mem_size - free_mem_ptr - 32;
 786 
 787     default:
 788       return RET_ERROR (EINVAL);
 789     }
 790 }
 791 
 792 static int
 793 guswave_set_instr (int dev, int voice, int instr_no)
     /*  */
 794 {
 795   int             sample_no;
 796 
 797   if (instr_no < 0 || instr_no > MAX_PATCH)
 798     return RET_ERROR (EINVAL);
 799 
 800   if (voice < 0 || voice > 31)
 801     return RET_ERROR (EINVAL);
 802 
 803   sample_no = patch_table[instr_no];
 804   patch_map[voice] = -1;
 805 
 806   if (sample_no < 0)
 807     {
 808       printk ("GUS: Undefined patch %d for voice %d\n", instr_no, voice);
 809       return RET_ERROR (EINVAL);/* Patch not defined */
 810     }
 811 
 812   if (sample_ptrs[sample_no] == -1)     /* Sample not loaded */
 813     {
 814       printk ("GUS: Sample #%d not loaded for patch %d (voice %d)\n", sample_no, instr_no, voice);
 815       return RET_ERROR (EINVAL);
 816     }
 817 
 818   sample_map[voice] = sample_no;
 819   patch_map[voice] = instr_no;
 820   return 0;
 821 }
 822 
 823 static int
 824 guswave_kill_note (int dev, int voice, int velocity)
     /*  */
 825 {
 826   unsigned long   flags;
 827 
 828   DISABLE_INTR (flags);
 829   gus_select_voice (voice);
 830   gus_voice_fade (voice);
 831   RESTORE_INTR (flags);
 832 
 833   return 0;
 834 }
 835 
 836 static void
 837 guswave_aftertouch (int dev, int voice, int pressure)
     /*  */
 838 {
 839   short           lo_limit, hi_limit;
 840   unsigned long   flags;
 841 
 842   return;                       /* Currently disabled */
 843 
 844   if (voice < 0 || voice > 31)
 845     return;
 846 
 847   if (voices[voice].mode & WAVE_ENVELOPES && voices[voice].env_phase != 2)
 848     return;                     /* Don't mix with envelopes */
 849 
 850   if (pressure < 32)
 851     {
 852       DISABLE_INTR (flags);
 853       gus_select_voice (voice);
 854       gus_rampoff ();
 855       compute_and_set_volume (voice, 255, 0);   /* Back to original volume */
 856       RESTORE_INTR (flags);
 857       return;
 858     }
 859 
 860   hi_limit = voices[voice].current_volume;
 861   lo_limit = hi_limit * 99 / 100;
 862   if (lo_limit < 65)
 863     lo_limit = 65;
 864 
 865   DISABLE_INTR (flags);
 866   gus_select_voice (voice);
 867   if (hi_limit > (4095 - 65))
 868     {
 869       hi_limit = 4095 - 65;
 870       gus_voice_volume (hi_limit);
 871     }
 872   gus_ramp_range (lo_limit, hi_limit);
 873   gus_ramp_rate (3, 8);
 874   gus_rampon (0x58);            /* Bidirectional, Down, Loop */
 875   RESTORE_INTR (flags);
 876 }
 877 
 878 static void
 879 guswave_panning (int dev, int voice, int value)
     /*  */
 880 {
 881   if (voice >= 0 || voice < 32)
 882     voices[voice].panning = value;
 883 }
 884 
 885 static void
 886 compute_volume (int voice, int volume)
     /*  */
 887 {
 888   if (volume < 128)
 889     {
 890       voices[voice].midi_volume = volume;
 891 
 892       switch (volume_method)
 893         {
 894         case VOL_METHOD_ADAGIO:
 895           voices[voice].initial_volume =
 896             gus_adagio_vol (volume, voices[voice].main_vol,
 897                             voices[voice].expression_vol,
 898                             voices[voice].patch_vol);
 899           break;
 900 
 901         default:
 902           voices[voice].initial_volume = volume_base + (volume * volume_scale);
 903         }
 904     }
 905 
 906   if (voices[voice].initial_volume > 4095)
 907     voices[voice].initial_volume = 4095;
 908 }
 909 
 910 static void
 911 compute_and_set_volume (int voice, int volume, int ramp_time)
     /*  */
 912 {
 913   int             current, target, rate;
 914 
 915   compute_volume (voice, volume);
 916   voices[voice].current_volume = voices[voice].initial_volume;
 917 
 918   current = gus_read16 (0x09) >> 4;
 919   target = voices[voice].initial_volume;
 920 
 921   if (ramp_time == INSTANT_RAMP)
 922     {
 923       gus_rampoff ();
 924       gus_voice_volume (target);
 925       return;
 926     }
 927 
 928   if (ramp_time == FAST_RAMP)
 929     rate = 63;
 930   else
 931     rate = 16;
 932   gus_ramp_rate (0, rate);
 933 
 934   if ((target - current) / 64 == 0)     /* Too close */
 935     {
 936       gus_rampoff ();
 937       gus_voice_volume (target);
 938       return;
 939     }
 940 
 941   if (target > current)
 942     {
 943       if (target > (4095 - 65))
 944         target = 4095 - 65;
 945       gus_ramp_range (current, target);
 946       gus_rampon (0x00);        /* Ramp up, once, no irq */
 947     }
 948   else
 949     {
 950       if (target < 65)
 951         target = 65;
 952 
 953       gus_ramp_range (target, current);
 954       gus_rampon (0x40);        /* Ramp down, once, no irq */
 955     }
 956 }
 957 
 958 static void
 959 dynamic_volume_change (int voice)
     /*  */
 960 {
 961   unsigned char   status;
 962   unsigned long   flags;
 963 
 964   DISABLE_INTR (flags);
 965   gus_select_voice (voice);
 966   status = gus_read8 (0x00);    /* Voice status */
 967   RESTORE_INTR (flags);
 968 
 969   if (status & 0x03)
 970     return;                     /* Voice not started */
 971 
 972   if (!(voices[voice].mode & WAVE_ENVELOPES))
 973     {
 974       compute_and_set_volume (voice, voices[voice].midi_volume, 1);
 975       return;
 976     }
 977 
 978   /*
 979    * Voice is running and has envelopes.
 980    */
 981 
 982   DISABLE_INTR (flags);
 983   gus_select_voice (voice);
 984   status = gus_read8 (0x0d);    /* Ramping status */
 985   RESTORE_INTR (flags);
 986 
 987   if (status & 0x03)            /* Sustain phase? */
 988     {
 989       compute_and_set_volume (voice, voices[voice].midi_volume, 1);
 990       return;
 991     }
 992 
 993   if (voices[voice].env_phase < 0)
 994     return;
 995 
 996   compute_volume (voice, voices[voice].midi_volume);
 997 
 998 #if 0                           /* Is this really required */
 999   voices[voice].current_volume =
1000     gus_read16 (0x09) >> 4;     /* Get current volume */
1001 
1002   voices[voice].env_phase--;
1003   step_envelope (voice);
1004 #endif
1005 }
1006 
1007 static void
1008 guswave_controller (int dev, int voice, int ctrl_num, int value)
     /*  */
1009 {
1010   unsigned long   flags;
1011   unsigned long   freq;
1012 
1013   if (voice < 0 || voice > 31)
1014     return;
1015 
1016   switch (ctrl_num)
1017     {
1018     case CTRL_PITCH_BENDER:
1019       voices[voice].bender = value;
1020       freq = compute_finetune (voices[voice].orig_freq, value, voices[voice].bender_range);
1021       voices[voice].current_freq = freq;
1022 
1023       DISABLE_INTR (flags);
1024       gus_select_voice (voice);
1025       gus_voice_freq (freq);
1026       RESTORE_INTR (flags);
1027       break;
1028 
1029     case CTRL_PITCH_BENDER_RANGE:
1030       voices[voice].bender_range = value;
1031       break;
1032 
1033     case CTRL_EXPRESSION:
1034       volume_method = VOL_METHOD_ADAGIO;
1035       voices[voice].expression_vol = value;
1036       dynamic_volume_change (voice);
1037       break;
1038 
1039     case CTRL_MAIN_VOLUME:
1040       volume_method = VOL_METHOD_ADAGIO;
1041       voices[voice].main_vol = value;
1042       dynamic_volume_change (voice);
1043       break;
1044 
1045     default:                    /* Ignore */
1046       break;
1047     }
1048 }
1049 
1050 static int
1051 guswave_start_note (int dev, int voice, int note_num, int volume)
     /*  */
1052 {
1053   int             sample, best_sample, best_delta, delta_freq;
1054   int             is16bits, samplep, patch, pan;
1055   unsigned long   note_freq, base_note, freq, flags;
1056   unsigned char   mode = 0;
1057 
1058   if (voice < 0 || voice > 31)
1059     {
1060       printk ("GUS: Invalid voice\n");
1061       return RET_ERROR (EINVAL);
1062     }
1063 
1064   if (note_num == 255)
1065     {
1066       if (voices[voice].mode & WAVE_ENVELOPES)
1067         {
1068           voices[voice].midi_volume = volume;
1069           dynamic_volume_change (voice);
1070           return 0;
1071         }
1072 
1073       compute_and_set_volume (voice, volume, 1);
1074       return 0;
1075     }
1076 
1077   if ((patch = patch_map[voice]) == -1)
1078     {
1079       return RET_ERROR (EINVAL);
1080     }
1081 
1082   if ((samplep = patch_table[patch]) == -1)
1083     {
1084       return RET_ERROR (EINVAL);
1085     }
1086 
1087   note_freq = note_to_freq (note_num);
1088 
1089   /*
1090    * Find a sample within a patch so that the note_freq is between low_note
1091    * and high_note.
1092    */
1093   sample = -1;
1094 
1095   best_sample = samplep;
1096   best_delta = 1000000;
1097   while (samplep >= 0 && sample == -1)
1098     {
1099       delta_freq = note_freq - samples[samplep].base_note;
1100       if (delta_freq < 0)
1101         delta_freq = -delta_freq;
1102       if (delta_freq < best_delta)
1103         {
1104           best_sample = samplep;
1105           best_delta = delta_freq;
1106         }
1107       if (samples[samplep].low_note <= note_freq && note_freq <= samples[samplep].high_note)
1108         sample = samplep;
1109       else
1110         samplep = samples[samplep].key; /* Follow link */
1111     }
1112   if (sample == -1)
1113     sample = best_sample;
1114 
1115   if (sample == -1)
1116     {
1117       printk ("GUS: Patch %d not defined for note %d\n", patch, note_num);
1118       return 0;                 /* Should play default patch ??? */
1119     }
1120 
1121   is16bits = (samples[sample].mode & WAVE_16_BITS) ? 1 : 0;     /* 8 or 16 bit samples */
1122   voices[voice].mode = samples[sample].mode;
1123   voices[voice].patch_vol = samples[sample].volume;
1124 
1125   if (voices[voice].mode & WAVE_ENVELOPES)
1126     {
1127       int             i;
1128 
1129       for (i = 0; i < 6; i++)
1130         {
1131           voices[voice].env_rate[i] = samples[sample].env_rate[i];
1132           voices[voice].env_offset[i] = samples[sample].env_offset[i];
1133         }
1134     }
1135 
1136   sample_map[voice] = sample;
1137 
1138   base_note = samples[sample].base_note / 100;  /* To avoid overflows */
1139   note_freq /= 100;
1140 
1141   freq = samples[sample].base_freq * note_freq / base_note;
1142 
1143   voices[voice].orig_freq = freq;
1144 
1145   /*
1146    * Since the pitch bender may have been set before playing the note, we
1147    * have to calculate the bending now.
1148    */
1149 
1150   freq = compute_finetune (voices[voice].orig_freq, voices[voice].bender, voices[voice].bender_range);
1151   voices[voice].current_freq = freq;
1152 
1153   pan = (samples[sample].panning + voices[voice].panning) / 32;
1154   pan += 7;
1155   if (pan < 0)
1156     pan = 0;
1157   if (pan > 15)
1158     pan = 15;
1159 
1160   if (samples[sample].mode & WAVE_16_BITS)
1161     {
1162       mode |= 0x04;             /* 16 bits */
1163       if ((sample_ptrs[sample] >> 18) !=
1164           ((sample_ptrs[sample] + samples[sample].len) >> 18))
1165         printk ("GUS: Sample address error\n");
1166     }
1167 
1168   /*************************************************************************
1169  *      CAUTION!        Interrupts disabled. Don't return before enabling
1170  *************************************************************************/
1171 
1172   DISABLE_INTR (flags);
1173   gus_select_voice (voice);
1174   gus_voice_off ();             /* It may still be running */
1175   gus_rampoff ();
1176   if (voices[voice].mode & WAVE_ENVELOPES)
1177     {
1178       compute_volume (voice, volume);
1179       init_envelope (voice);
1180     }
1181   else
1182     compute_and_set_volume (voice, volume, 0);
1183 
1184   if (samples[sample].mode & WAVE_LOOP_BACK)
1185     gus_write_addr (0x0a, sample_ptrs[sample] + samples[sample].len, is16bits); /* Sample start=end */
1186   else
1187     gus_write_addr (0x0a, sample_ptrs[sample], is16bits);       /* Sample start=begin */
1188 
1189   if (samples[sample].mode & WAVE_LOOPING)
1190     {
1191       mode |= 0x08;             /* Looping on */
1192 
1193       if (samples[sample].mode & WAVE_BIDIR_LOOP)
1194         mode |= 0x10;           /* Bidirectional looping on */
1195 
1196       if (samples[sample].mode & WAVE_LOOP_BACK)
1197         {
1198           gus_write_addr (0x0a, /* Put the current location = loop_end */
1199                   sample_ptrs[sample] + samples[sample].loop_end, is16bits);
1200           mode |= 0x40;         /* Loop backwards */
1201         }
1202 
1203       gus_write_addr (0x02, sample_ptrs[sample] + samples[sample].loop_start, is16bits);        /* Loop start location */
1204       gus_write_addr (0x04, sample_ptrs[sample] + samples[sample].loop_end, is16bits);  /* Loop end location */
1205     }
1206   else
1207     {
1208       mode |= 0x20;             /* Loop irq at the end */
1209       voices[voice].loop_irq_mode = LMODE_FINISH;       /* Ramp it down at the
1210                                                          * end */
1211       voices[voice].loop_irq_parm = 1;
1212       gus_write_addr (0x02, sample_ptrs[sample], is16bits);     /* Loop start location */
1213       gus_write_addr (0x04, sample_ptrs[sample] + samples[sample].len, is16bits);       /* Loop end location */
1214     }
1215   gus_voice_freq (freq);
1216   gus_voice_balance (pan);
1217   gus_voice_on (mode);
1218   RESTORE_INTR (flags);
1219 
1220   return 0;
1221 }
1222 
1223 static void
1224 guswave_reset (int dev)
     /*  */
1225 {
1226   int             i;
1227 
1228   for (i = 0; i < 32; i++)
1229     gus_voice_init (i);
1230 }
1231 
1232 static int
1233 guswave_open (int dev, int mode)
     /*  */
1234 {
1235   int             err;
1236 
1237   if (gus_busy)
1238     return RET_ERROR (EBUSY);
1239 
1240   if ((err = DMAbuf_open_dma (gus_devnum)))
1241     return err;
1242 
1243   RESET_WAIT_QUEUE (dram_sleeper, dram_sleep_flag);
1244   gus_busy = 1;
1245   active_device = GUS_DEV_WAVE;
1246 
1247   gus_reset ();
1248 
1249   return 0;
1250 }
1251 
1252 static void
1253 guswave_close (int dev)
     /*  */
1254 {
1255   gus_busy = 0;
1256   active_device = 0;
1257   gus_reset ();
1258 
1259   DMAbuf_close_dma (gus_devnum);
1260 }
1261 
1262 static int
1263 guswave_load_patch (int dev, int format, snd_rw_buf * addr,
     /*  */
1264                     int offs, int count, int pmgr_flag)
1265 {
1266   struct patch_info patch;
1267   int             instr;
1268   long            sizeof_patch;
1269 
1270   unsigned long   blk_size, blk_end, left, src_offs, target;
1271 
1272   sizeof_patch = (long) &patch.data[0] - (long) &patch; /* Size of the header
1273                                                          * info */
1274 
1275   if (format != GUS_PATCH)
1276     {
1277       printk ("GUS Error: Invalid patch format (key) 0x%04x\n", format);
1278       return RET_ERROR (EINVAL);
1279     }
1280 
1281   if (count < sizeof_patch)
1282     {
1283       printk ("GUS Error: Patch header too short\n");
1284       return RET_ERROR (EINVAL);
1285     }
1286 
1287   count -= sizeof_patch;
1288 
1289   if (free_sample >= MAX_SAMPLE)
1290     {
1291       printk ("GUS: Sample table full\n");
1292       return RET_ERROR (ENOSPC);
1293     }
1294 
1295   /*
1296    * Copy the header from user space but ignore the first bytes which have
1297    * been transferred already.
1298    */
1299 
1300   COPY_FROM_USER (&((char *) &patch)[offs], addr, offs, sizeof_patch - offs);
1301 
1302   instr = patch.instr_no;
1303 
1304   if (instr < 0 || instr > MAX_PATCH)
1305     {
1306       printk ("GUS: Invalid patch number %d\n", instr);
1307       return RET_ERROR (EINVAL);
1308     }
1309 
1310   if (count < patch.len)
1311     {
1312       printk ("GUS Warning: Patch record too short (%d<%lu)\n",
1313               count, patch.len);
1314       patch.len = count;
1315     }
1316 
1317   if (patch.len <= 0 || patch.len > gus_mem_size)
1318     {
1319       printk ("GUS: Invalid sample length %lu\n", patch.len);
1320       return RET_ERROR (EINVAL);
1321     }
1322 
1323   if (patch.mode & WAVE_LOOPING)
1324     {
1325       if (patch.loop_start < 0 || patch.loop_start >= patch.len)
1326         {
1327           printk ("GUS: Invalid loop start\n");
1328           return RET_ERROR (EINVAL);
1329         }
1330 
1331       if (patch.loop_end < patch.loop_start || patch.loop_end > patch.len)
1332         {
1333           printk ("GUS: Invalid loop end\n");
1334           return RET_ERROR (EINVAL);
1335         }
1336     }
1337 
1338   free_mem_ptr = (free_mem_ptr + 31) & ~31;     /* Alignment 32 bytes */
1339 
1340 #define GUS_BANK_SIZE (256*1024)
1341 
1342   if (patch.mode & WAVE_16_BITS)
1343     {
1344       /*
1345        * 16 bit samples must fit one 256k bank.
1346        */
1347       if (patch.len >= GUS_BANK_SIZE)
1348         {
1349           printk ("GUS: Sample (16 bit) too long %lu\n", patch.len);
1350           return RET_ERROR (ENOSPC);
1351         }
1352 
1353       if ((free_mem_ptr / GUS_BANK_SIZE) !=
1354           ((free_mem_ptr + patch.len) / GUS_BANK_SIZE))
1355         {
1356           unsigned long   tmp_mem =     /* Align to 256K*N */
1357           ((free_mem_ptr / GUS_BANK_SIZE) + 1) * GUS_BANK_SIZE;
1358 
1359           if ((tmp_mem + patch.len) > gus_mem_size)
1360             return RET_ERROR (ENOSPC);
1361 
1362           free_mem_ptr = tmp_mem;       /* This leaves unusable memory */
1363         }
1364     }
1365 
1366   if ((free_mem_ptr + patch.len) > gus_mem_size)
1367     return RET_ERROR (ENOSPC);
1368 
1369   sample_ptrs[free_sample] = free_mem_ptr;
1370 
1371   /* Tremolo is not possible with envelopes */
1372 
1373   if (patch.mode & WAVE_ENVELOPES)
1374     patch.mode &= ~WAVE_TREMOLO;
1375 
1376   memcpy ((char *) &samples[free_sample], &patch, sizeof_patch);
1377 
1378   /*
1379    * Link this_one sample to the list of samples for patch 'instr'.
1380    */
1381 
1382   samples[free_sample].key = patch_table[instr];
1383   patch_table[instr] = free_sample;
1384 
1385   /*
1386    * Use DMA to transfer the wave data to the DRAM
1387    */
1388 
1389   left = patch.len;
1390   src_offs = 0;
1391   target = free_mem_ptr;
1392 
1393   while (left)                  /* Not all moved */
1394     {
1395       blk_size = sound_buffsizes[gus_devnum];
1396       if (blk_size > left)
1397         blk_size = left;
1398 
1399       /*
1400        * DMA cannot cross 256k bank boundaries. Check for that.
1401        */
1402       blk_end = target + blk_size;
1403 
1404       if ((target >> 18) != (blk_end >> 18))
1405         {                       /* Have to split the block */
1406 
1407           blk_end &= ~(256 * 1024 - 1);
1408           blk_size = blk_end - target;
1409         }
1410 
1411 #if defined(GUS_NO_DMA) || defined(GUS_PATCH_NO_DMA)
1412       /*
1413        * For some reason the DMA is not possible. We have to use PIO.
1414        */
1415       {
1416         long            i;
1417         unsigned char   data;
1418 
1419         for (i = 0; i < blk_size; i++)
1420           {
1421             GET_BYTE_FROM_USER (data, addr, sizeof_patch + i);
1422             if (patch.mode & WAVE_UNSIGNED)
1423 
1424                if (!(patch.mode & WAVE_16_BITS) || (i & 0x01))
1425                   data ^= 0x80;                 /* Convert to signed */
1426             gus_poke (target + i, data);
1427           }
1428       }
1429 #else /* GUS_NO_DMA */
1430       {
1431         unsigned long   address, hold_address;
1432         unsigned char   dma_command;
1433 
1434         /*
1435          * OK, move now. First in and then out.
1436          */
1437 
1438         COPY_FROM_USER (snd_raw_buf[gus_devnum][0],
1439                         addr, sizeof_patch + src_offs,
1440                         blk_size);
1441 
1442         gus_write8 (0x41, 0);   /* Disable GF1 DMA */
1443         DMAbuf_start_dma (gus_devnum, snd_raw_buf_phys[gus_devnum][0],
1444                           blk_size, DMA_MODE_WRITE);
1445 
1446         /*
1447          * Set the DRAM address for the wave data
1448          */
1449 
1450         address = target;
1451 
1452         if (sound_dsp_dmachan[gus_devnum] > 3)
1453           {
1454             hold_address = address;
1455             address = address >> 1;
1456             address &= 0x0001ffffL;
1457             address |= (hold_address & 0x000c0000L);
1458           }
1459 
1460         gus_write16 (0x42, (address >> 4) & 0xffff);    /* DRAM DMA address */
1461 
1462         /*
1463          * Start the DMA transfer
1464          */
1465 
1466         dma_command = 0x21;     /* IRQ enable, DMA start */
1467         if (patch.mode & WAVE_UNSIGNED)
1468           dma_command |= 0x80;  /* Invert MSB */
1469         if (patch.mode & WAVE_16_BITS)
1470           dma_command |= 0x40;  /* 16 bit _DATA_ */
1471         if (sound_dsp_dmachan[gus_devnum] > 3)
1472           dma_command |= 0x04;  /* 16 bit DMA channel */
1473 
1474         gus_write8 (0x41, dma_command); /* Let's go luteet (=bugs) */
1475 
1476         /*
1477          * Sleep here until the DRAM DMA done interrupt is served
1478          */
1479         active_device = GUS_DEV_WAVE;
1480 
1481         DO_SLEEP (dram_sleeper, dram_sleep_flag, HZ);
1482         if (TIMED_OUT (dram_sleeper, dram_sleep_flag))
1483           printk ("GUS: DMA Transfer timed out\n");
1484       }
1485 #endif /* GUS_NO_DMA */
1486 
1487       /*
1488        * Now the next part
1489        */
1490 
1491       left -= blk_size;
1492       src_offs += blk_size;
1493       target += blk_size;
1494 
1495       gus_write8 (0x41, 0);     /* Stop DMA */
1496     }
1497 
1498   free_mem_ptr += patch.len;
1499 
1500   if (!pmgr_flag)
1501     pmgr_inform (dev, PM_E_PATCH_LOADED, instr, free_sample, 0, 0);
1502   free_sample++;
1503   return 0;
1504 }
1505 
1506 static void
1507 guswave_hw_control (int dev, unsigned char *event)
     /*  */
1508 {
1509   int             voice, cmd;
1510   unsigned short  p1, p2;
1511   unsigned long   plong, flags;
1512 
1513   cmd = event[2];
1514   voice = event[3];
1515   p1 = *(unsigned short *) &event[4];
1516   p2 = *(unsigned short *) &event[6];
1517   plong = *(unsigned long *) &event[4];
1518 
1519   switch (cmd)
1520     {
1521 
1522     case _GUS_NUMVOICES:
1523       DISABLE_INTR (flags);
1524       gus_select_voice (voice);
1525       gus_select_max_voices (p1);
1526       RESTORE_INTR (flags);
1527       break;
1528 
1529     case _GUS_VOICESAMPLE:
1530       guswave_set_instr (dev, voice, p1);
1531       break;
1532 
1533     case _GUS_VOICEON:
1534       DISABLE_INTR (flags);
1535       gus_select_voice (voice);
1536       p1 &= ~0x20;              /* Disable intr */
1537       gus_voice_on (p1);
1538       RESTORE_INTR (flags);
1539       break;
1540 
1541     case _GUS_VOICEOFF:
1542       DISABLE_INTR (flags);
1543       gus_select_voice (voice);
1544       gus_voice_off ();
1545       RESTORE_INTR (flags);
1546       break;
1547 
1548     case _GUS_VOICEFADE:
1549       DISABLE_INTR (flags);
1550       gus_select_voice (voice);
1551       gus_voice_fade (voice);
1552       RESTORE_INTR (flags);
1553       break;
1554 
1555     case _GUS_VOICEMODE:
1556       DISABLE_INTR (flags);
1557       gus_select_voice (voice);
1558       p1 &= ~0x20;              /* Disable intr */
1559       gus_voice_mode (p1);
1560       RESTORE_INTR (flags);
1561       break;
1562 
1563     case _GUS_VOICEBALA:
1564       DISABLE_INTR (flags);
1565       gus_select_voice (voice);
1566       gus_voice_balance (p1);
1567       RESTORE_INTR (flags);
1568       break;
1569 
1570     case _GUS_VOICEFREQ:
1571       DISABLE_INTR (flags);
1572       gus_select_voice (voice);
1573       gus_voice_freq (plong);
1574       RESTORE_INTR (flags);
1575       break;
1576 
1577     case _GUS_VOICEVOL:
1578       DISABLE_INTR (flags);
1579       gus_select_voice (voice);
1580       gus_voice_volume (p1);
1581       RESTORE_INTR (flags);
1582       break;
1583 
1584     case _GUS_VOICEVOL2:        /* Just update the voice value */
1585       voices[voice].initial_volume =
1586         voices[voice].current_volume = p1;
1587       break;
1588 
1589     case _GUS_RAMPRANGE:
1590       if (voices[voice].mode & WAVE_ENVELOPES)
1591         break;                  /* NO-NO */
1592       DISABLE_INTR (flags);
1593       gus_select_voice (voice);
1594       gus_ramp_range (p1, p2);
1595       RESTORE_INTR (flags);
1596       break;
1597 
1598     case _GUS_RAMPRATE:
1599       if (voices[voice].mode & WAVE_ENVELOPES)
1600         break;                  /* NO-NO */
1601       DISABLE_INTR (flags);
1602       gus_select_voice (voice);
1603       gus_ramp_rate (p1, p2);
1604       RESTORE_INTR (flags);
1605       break;
1606 
1607     case _GUS_RAMPMODE:
1608       if (voices[voice].mode & WAVE_ENVELOPES)
1609         break;                  /* NO-NO */
1610       DISABLE_INTR (flags);
1611       gus_select_voice (voice);
1612       p1 &= ~0x20;              /* Disable intr */
1613       gus_ramp_mode (p1);
1614       RESTORE_INTR (flags);
1615       break;
1616 
1617     case _GUS_RAMPON:
1618       if (voices[voice].mode & WAVE_ENVELOPES)
1619         break;                  /* NO-NO */
1620       DISABLE_INTR (flags);
1621       gus_select_voice (voice);
1622       p1 &= ~0x20;              /* Disable intr */
1623       gus_rampon (p1);
1624       RESTORE_INTR (flags);
1625       break;
1626 
1627     case _GUS_RAMPOFF:
1628       if (voices[voice].mode & WAVE_ENVELOPES)
1629         break;                  /* NO-NO */
1630       DISABLE_INTR (flags);
1631       gus_select_voice (voice);
1632       gus_rampoff ();
1633       RESTORE_INTR (flags);
1634       break;
1635 
1636     case _GUS_VOLUME_SCALE:
1637       volume_base = p1;
1638       volume_scale = p2;
1639       break;
1640 
1641     default:;
1642     }
1643 }
1644 
1645 static int
1646 gus_sampling_set_speed (int speed)
     /*  */
1647 {
1648   if (speed <= 0)
1649     return gus_sampling_speed;
1650 
1651   if (speed > 44100)
1652     speed = 44100;
1653 
1654   gus_sampling_speed = speed;
1655   return speed;
1656 }
1657 
1658 static int
1659 gus_sampling_set_channels (int channels)
     /*  */
1660 {
1661   if (!channels)
1662     return gus_sampling_channels;
1663   if (channels > 2)
1664     channels = 2;
1665   if (channels < 1)
1666     channels = 1;
1667   gus_sampling_channels = channels;
1668   return channels;
1669 }
1670 
1671 static int
1672 gus_sampling_set_bits (int bits)
     /*  */
1673 {
1674   if (!bits)
1675     return gus_sampling_bits;
1676 
1677   if (bits != 8 && bits != 16)
1678     bits = 8;
1679 
1680   gus_sampling_bits = bits;
1681   return bits;
1682 }
1683 
1684 static int
1685 gus_sampling_ioctl (int dev, unsigned int cmd, unsigned int arg, int local)
     /*  */
1686 {
1687   switch (cmd)
1688     {
1689     case SOUND_PCM_WRITE_RATE:
1690       if (local)
1691         return gus_sampling_set_speed (arg);
1692       return IOCTL_OUT (arg, gus_sampling_set_speed (IOCTL_IN (arg)));
1693       break;
1694 
1695     case SOUND_PCM_READ_RATE:
1696       if (local)
1697         return gus_sampling_speed;
1698       return IOCTL_OUT (arg, gus_sampling_speed);
1699       break;
1700 
1701     case SNDCTL_DSP_STEREO:
1702       if (local)
1703         return gus_sampling_set_channels (arg + 1) - 1;
1704       return IOCTL_OUT (arg, gus_sampling_set_channels (IOCTL_IN (arg) + 1) - 1);
1705       break;
1706 
1707     case SOUND_PCM_WRITE_CHANNELS:
1708       if (local) return gus_sampling_set_channels(arg);
1709       return IOCTL_OUT (arg, gus_sampling_set_channels (IOCTL_IN (arg)));
1710       break;
1711 
1712     case SOUND_PCM_READ_CHANNELS:
1713       if (local)
1714         return gus_sampling_channels;
1715       return IOCTL_OUT (arg, gus_sampling_channels);
1716       break;
1717 
1718     case SNDCTL_DSP_SAMPLESIZE:
1719       if (local)
1720         return gus_sampling_set_bits (arg);
1721       return IOCTL_OUT (arg, gus_sampling_set_bits (IOCTL_IN (arg)));
1722       break;
1723 
1724     case SOUND_PCM_READ_BITS:
1725       if (local)
1726         return gus_sampling_bits;
1727       return IOCTL_OUT (arg, gus_sampling_bits);
1728 
1729     case SOUND_PCM_WRITE_FILTER:        /* NOT YET IMPLEMENTED */
1730       return IOCTL_OUT (arg, RET_ERROR (EINVAL));
1731       break;
1732 
1733     case SOUND_PCM_READ_FILTER:
1734       return IOCTL_OUT (arg, RET_ERROR (EINVAL));
1735       break;
1736 
1737     default:
1738       return RET_ERROR (EINVAL);
1739     }
1740   return RET_ERROR (EINVAL);
1741 }
1742 
1743 static void
1744 gus_sampling_reset (int dev)
     /*  */
1745 {
1746 }
1747 
1748 static int
1749 gus_sampling_open (int dev, int mode)
     /*  */
1750 {
1751 #ifdef GUS_NO_DMA
1752   printk ("GUS: DMA mode not enabled. Device not supported\n");
1753   return RET_ERROR (ENXIO);
1754 #endif
1755 
1756   if (gus_busy)
1757     return RET_ERROR (EBUSY);
1758 
1759   gus_busy = 1;
1760   active_device = 0;
1761 
1762   gus_reset ();
1763   reset_sample_memory ();
1764   gus_select_max_voices (14);
1765 
1766   pcm_active = 0;
1767 
1768   return 0;
1769 }
1770 
1771 static void
1772 gus_sampling_close (int dev)
     /*  */
1773 {
1774   gus_reset ();
1775   gus_busy = 0;
1776   active_device = 0;
1777 }
1778 
1779 static void
1780 play_next_pcm_block (void)
     /*  */
1781 {
1782   unsigned long   flags;
1783   int             speed = gus_sampling_speed;
1784   int             this_one, is16bits, chn;
1785   unsigned long   dram_loc;
1786   unsigned char   mode[2], ramp_mode[2];
1787 
1788   if (!pcm_qlen)
1789     return;
1790 
1791   this_one = pcm_head;
1792 
1793   for (chn = 0; chn < gus_sampling_channels; chn++)
1794     {
1795       mode[chn] = 0x00;
1796       ramp_mode[chn] = 0x03;    /* Ramping and rollover off */
1797 
1798       if (chn == 0)
1799         {
1800           mode[chn] |= 0x20;    /* Loop irq */
1801           voices[chn].loop_irq_mode = LMODE_PCM;
1802         }
1803 
1804       if (gus_sampling_bits != 8)
1805         {
1806           is16bits = 1;
1807           mode[chn] |= 0x04;    /* 16 bit data */
1808         }
1809       else
1810         is16bits = 0;
1811 
1812       dram_loc = this_one * pcm_bsize;
1813       dram_loc += chn * pcm_banksize;
1814 
1815       if (this_one == (pcm_nblk - 1))   /* Last of the DRAM buffers */
1816         {
1817           mode[chn] |= 0x08;    /* Enable loop */
1818           ramp_mode[chn] = 0x03;/* Disable rollover */
1819         }
1820       else
1821         {
1822           if (chn == 0)
1823             ramp_mode[chn] = 0x04;      /* Enable rollover bit */
1824         }
1825 
1826       DISABLE_INTR (flags);
1827       gus_select_voice (chn);
1828       gus_voice_freq (speed);
1829 
1830       if (gus_sampling_channels == 1)
1831         gus_voice_balance (7);  /* mono */
1832       else if (chn == 0)
1833         gus_voice_balance (0);  /* left */
1834       else
1835         gus_voice_balance (15); /* right */
1836 
1837       if (!pcm_active)          /* Voice not started yet */
1838         {
1839           /*
1840            * The playback was not started yet (or there has been a pause).
1841            * Start the voice (again) and ask for a rollover irq at the end of
1842            * this_one block. If this_one one is last of the buffers, use just
1843            * the normal loop with irq.
1844            */
1845 
1846           gus_voice_off ();     /* It could already be running */
1847           gus_rampoff ();
1848           gus_voice_volume (4000);
1849           gus_ramp_range (65, 4030);
1850 
1851           gus_write_addr (0x0a, dram_loc, is16bits);    /* Starting position */
1852           gus_write_addr (0x02, chn * pcm_banksize, is16bits);  /* Loop start location */
1853 
1854           if (chn != 0)
1855             gus_write_addr (0x04, pcm_banksize + (pcm_bsize * pcm_nblk),
1856                             is16bits);  /* Loop end location */
1857         }
1858 
1859       if (chn == 0)
1860         gus_write_addr (0x04, dram_loc + pcm_datasize[this_one], is16bits);     /* Loop end location */
1861       else
1862         mode[chn] |= 0x08;      /* Enable loop */
1863 
1864       if (pcm_datasize[this_one] != pcm_bsize)
1865         {
1866           /* Incomplete block. Possibly the last one. */
1867           if (chn == 0)
1868             {
1869               mode[chn] &= ~0x08;       /* Disable loop */
1870               mode[chn] |= 0x20;/* Enable loop IRQ */
1871               voices[0].loop_irq_mode = LMODE_PCM_STOP;
1872               ramp_mode[chn] = 0x03;    /* No rollover bit */
1873             }
1874           else
1875             {
1876               gus_write_addr (0x04, dram_loc + pcm_datasize[this_one], is16bits);       /* Loop end location */
1877               mode[chn] &= ~0x08;       /* Disable loop */
1878             }
1879         }
1880 
1881       RESTORE_INTR (flags);
1882     }
1883 
1884   for (chn = 0; chn < gus_sampling_channels; chn++)
1885     {
1886       DISABLE_INTR (flags);
1887       gus_select_voice (chn);
1888       gus_write8 (0x0d, ramp_mode[chn]);
1889       gus_voice_on (mode[chn]);
1890       RESTORE_INTR (flags);
1891     }
1892 
1893   pcm_active = 1;
1894 }
1895 
1896 static void
1897 gus_transfer_output_block (int dev, unsigned long buf,
     /*  */
1898                            int total_count, int intrflag, int chn)
1899 {
1900   /*
1901    * This routine transfers one block of audio data to the DRAM. In mono mode
1902    * it's called just once. When in stereo mode, this_one routine is called
1903    * once for both channels.
1904    * 
1905    * The left/mono channel data is transferred to the beginning of dram and the
1906    * right data to the area pointed by gus_page_size.
1907    */
1908 
1909   int             this_one, count;
1910   unsigned long   flags;
1911   unsigned char   dma_command;
1912   unsigned long   address, hold_address;
1913 
1914   DISABLE_INTR (flags);
1915 
1916   count = total_count / gus_sampling_channels;
1917 
1918   if (chn == 0)
1919     {
1920       if (pcm_qlen >= pcm_nblk)
1921         printk ("GUS Warning: PCM buffers out of sync\n");
1922 
1923       this_one = pcm_current_block = pcm_tail;
1924       pcm_qlen++;
1925       pcm_tail = (pcm_tail + 1) % pcm_nblk;
1926       pcm_datasize[this_one] = count;
1927     }
1928   else
1929     this_one = pcm_current_block;
1930 
1931   gus_write8 (0x41, 0);         /* Disable GF1 DMA */
1932   DMAbuf_start_dma (dev, buf + (chn * count), count, DMA_MODE_WRITE);
1933 
1934   address = this_one * pcm_bsize;
1935   address += chn * pcm_banksize;
1936 
1937   if (sound_dsp_dmachan[dev] > 3)
1938     {
1939       hold_address = address;
1940       address = address >> 1;
1941       address &= 0x0001ffffL;
1942       address |= (hold_address & 0x000c0000L);
1943     }
1944 
1945   gus_write16 (0x42, (address >> 4) & 0xffff);  /* DRAM DMA address */
1946 
1947   dma_command = 0x21;           /* IRQ enable, DMA start */
1948 
1949   if (gus_sampling_bits != 8)
1950     dma_command |= 0x40;        /* 16 bit _DATA_ */
1951   else
1952     dma_command |= 0x80;        /* Invert MSB */
1953 
1954   if (sound_dsp_dmachan[dev] > 3)
1955     dma_command |= 0x04;        /* 16 bit DMA channel */
1956 
1957   gus_write8 (0x41, dma_command);       /* Kick on */
1958 
1959   if (chn == (gus_sampling_channels - 1))       /* Last channel */
1960     {
1961       /* Last (right or mono) channel data */
1962       active_device = GUS_DEV_PCM_DONE;
1963       if (!pcm_active && (pcm_qlen > 2 || count < pcm_bsize))
1964         {
1965           play_next_pcm_block ();
1966         }
1967     }
1968   else                          /* Left channel data. The right channel is
1969                                  * transferred after DMA interrupt */
1970     active_device = GUS_DEV_PCM_CONTINUE;
1971 
1972   RESTORE_INTR (flags);
1973 }
1974 
1975 static void
1976 gus_sampling_output_block (int dev, unsigned long buf, int total_count, 
     /*  */
1977                            int intrflag, int restart_dma)
1978 {
1979   pcm_current_buf = buf;
1980   pcm_current_count = total_count;
1981   pcm_current_intrflag = intrflag;
1982   pcm_current_dev = dev;
1983   gus_transfer_output_block (dev, buf, total_count, intrflag, 0);
1984 }
1985 
1986 static void
1987 gus_sampling_start_input (int dev, unsigned long buf, int count, 
     /*  */
1988                           int intrflag, int restart_dma)
1989 {
1990   unsigned long   flags;
1991   unsigned char   mode;
1992 
1993   DISABLE_INTR (flags);
1994 
1995   DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ);
1996 
1997   mode = 0xa0;                  /* DMA IRQ enable, invert MSB */
1998 
1999   if (sound_dsp_dmachan[dev] > 3)
2000     mode |= 0x04;               /* 16 bit DMA channel */
2001   if (gus_sampling_channels > 1)
2002     mode |= 0x02;               /* Stereo */
2003   mode |= 0x01;                 /* DMA enable */
2004 
2005   gus_write8 (0x49, mode);
2006 
2007   RESTORE_INTR (flags);
2008 }
2009 
2010 static int
2011 gus_sampling_prepare_for_input (int dev, int bsize, int bcount)
     /*  */
2012 {
2013   unsigned int    rate;
2014 
2015   rate = (9878400 / (gus_sampling_speed + 2)) / 16;
2016 
2017   gus_write8 (0x48, rate & 0xff);       /* Set sampling frequency */
2018 
2019   if (gus_sampling_bits != 8)
2020     {
2021       printk ("GUS Error: 16 bit recording not supported\n");
2022       return RET_ERROR (EINVAL);
2023     }
2024 
2025   return 0;
2026 }
2027 
2028 static int
2029 gus_sampling_prepare_for_output (int dev, int bsize, int bcount)
     /*  */
2030 {
2031   int             i;
2032 
2033   long            mem_ptr, mem_size;
2034 
2035   mem_ptr = 0;
2036   mem_size = gus_mem_size / gus_sampling_channels;
2037 
2038   if (mem_size > (256 * 1024))
2039     mem_size = 256 * 1024;
2040 
2041   pcm_bsize = bsize / gus_sampling_channels;
2042   pcm_head = pcm_tail = pcm_qlen = 0;
2043 
2044   pcm_nblk = MAX_PCM_BUFFERS;
2045   if ((pcm_bsize * pcm_nblk) > mem_size)
2046     pcm_nblk = mem_size / pcm_bsize;
2047 
2048   for (i = 0; i < pcm_nblk; i++)
2049     pcm_datasize[i] = 0;
2050 
2051   pcm_banksize = pcm_nblk * pcm_bsize;
2052 
2053   if (gus_sampling_bits != 8 && pcm_banksize == (256 * 1024))
2054     pcm_nblk--;
2055 
2056   return 0;
2057 }
2058 
2059 static int
2060 gus_has_output_drained (int dev)
     /*  */
2061 {
2062   return !pcm_qlen;
2063 }
2064 
2065 static void
2066 gus_copy_from_user (int dev, char *localbuf, int localoffs,
     /*  */
2067                     snd_rw_buf * userbuf, int useroffs, int len)
2068 {
2069   if (gus_sampling_channels == 1)
2070     {
2071       COPY_FROM_USER (&localbuf[localoffs], userbuf, useroffs, len);
2072     }
2073   else if (gus_sampling_bits == 8)
2074     {
2075       int             in_left = useroffs;
2076       int             in_right = useroffs + 1;
2077       char           *out_left, *out_right;
2078       int             i;
2079 
2080       len /= 2;
2081       localoffs /= 2;
2082       out_left = &localbuf[localoffs];
2083       out_right = out_left + pcm_bsize;
2084 
2085       for (i = 0; i < len; i++)
2086         {
2087           GET_BYTE_FROM_USER (*out_left++, userbuf, in_left);
2088           in_left += 2;
2089           GET_BYTE_FROM_USER (*out_right++, userbuf, in_right);
2090           in_right += 2;
2091         }
2092     }
2093   else
2094     {
2095       int             in_left = useroffs;
2096       int             in_right = useroffs + 1;
2097       short          *out_left, *out_right;
2098       int             i;
2099 
2100       len /= 4;
2101       localoffs /= 4;
2102 
2103       out_left = (short *) &localbuf[localoffs];
2104       out_right = out_left + (pcm_bsize / 2);
2105 
2106       for (i = 0; i < len; i++)
2107         {
2108           GET_SHORT_FROM_USER (*out_left++, (short *) userbuf, in_left);
2109           in_left += 2;
2110           GET_SHORT_FROM_USER (*out_right++, (short *) userbuf, in_right);
2111           in_right += 2;
2112         }
2113     }
2114 }
2115 
2116 static struct audio_operations gus_sampling_operations =
2117 {
2118   "Gravis UltraSound",
2119   gus_sampling_open,            /* */
2120   gus_sampling_close,           /* */
2121   gus_sampling_output_block,    /* */
2122   gus_sampling_start_input,     /* */
2123   gus_sampling_ioctl,           /* */
2124   gus_sampling_prepare_for_input,       /* */
2125   gus_sampling_prepare_for_output,      /* */
2126   gus_sampling_reset,           /* */
2127   gus_sampling_reset,           /* halt_xfer */
2128   gus_has_output_drained,
2129   gus_copy_from_user
2130 };
2131 
2132 static int
2133 guswave_patchmgr (int dev, struct patmgr_info *rec)
     /*  */
2134 {
2135   int             i, n;
2136 
2137   switch (rec->command)
2138     {
2139     case PM_GET_DEVTYPE:
2140       rec->parm1 = PMTYPE_WAVE;
2141       return 0;
2142       break;
2143 
2144     case PM_GET_NRPGM:
2145       rec->parm1 = MAX_PATCH;
2146       return 0;
2147       break;
2148 
2149     case PM_GET_PGMMAP:
2150       rec->parm1 = MAX_PATCH;
2151 
2152       for (i = 0; i < MAX_PATCH; i++)
2153         {
2154           int             ptr = patch_table[i];
2155 
2156           rec->data.data8[i] = 0;
2157 
2158           while (ptr >= 0 && ptr < free_sample)
2159             {
2160               rec->data.data8[i]++;
2161               ptr = samples[ptr].key;   /* Follow link */
2162             }
2163         }
2164       return 0;
2165       break;
2166 
2167     case PM_GET_PGM_PATCHES:
2168       {
2169         int             ptr = patch_table[rec->parm1];
2170 
2171         n = 0;
2172 
2173         while (ptr >= 0 && ptr < free_sample)
2174           {
2175             rec->data.data32[n++] = ptr;
2176             ptr = samples[ptr].key;     /* Follow link */
2177           }
2178       }
2179       rec->parm1 = n;
2180       return 0;
2181       break;
2182 
2183     case PM_GET_PATCH:
2184       {
2185         int             ptr = rec->parm1;
2186         struct patch_info *pat;
2187 
2188         if (ptr < 0 || ptr >= free_sample)
2189           return RET_ERROR (EINVAL);
2190 
2191         memcpy (rec->data.data8, (char *) &samples[ptr],
2192                 sizeof (struct patch_info));
2193 
2194         pat = (struct patch_info *) rec->data.data8;
2195 
2196         pat->key = GUS_PATCH;   /* Restore patch type */
2197         rec->parm1 = sample_ptrs[ptr];  /* DRAM address */
2198         rec->parm2 = sizeof (struct patch_info);
2199       }
2200       return 0;
2201       break;
2202 
2203     case PM_SET_PATCH:
2204       {
2205         int             ptr = rec->parm1;
2206         struct patch_info *pat;
2207 
2208         if (ptr < 0 || ptr >= free_sample)
2209           return RET_ERROR (EINVAL);
2210 
2211         pat = (struct patch_info *) rec->data.data8;
2212 
2213         if (pat->len > samples[ptr].len)        /* Cannot expand sample */
2214           return RET_ERROR (EINVAL);
2215 
2216         pat->key = samples[ptr].key;    /* Ensure the link is correct */
2217 
2218         memcpy ((char *) &samples[ptr], rec->data.data8,
2219                 sizeof (struct patch_info));
2220 
2221         pat->key = GUS_PATCH;
2222       }
2223       return 0;
2224       break;
2225 
2226     case PM_READ_PATCH: /* Returns a block of wave data from the DRAM */
2227       {
2228         int             sample = rec->parm1;
2229         int             n;
2230         long            offs = rec->parm2;
2231         int             l = rec->parm3;
2232 
2233         if (sample < 0 || sample >= free_sample)
2234           return RET_ERROR (EINVAL);
2235 
2236         if (offs < 0 || offs >= samples[sample].len)
2237           return RET_ERROR (EINVAL);    /* Invalid offset */
2238 
2239         n = samples[sample].len - offs; /* Nr of bytes left */
2240 
2241         if (l > n)
2242           l = n;
2243 
2244         if (l > sizeof (rec->data.data8))
2245           l = sizeof (rec->data.data8);
2246 
2247         if (l <= 0)
2248           return RET_ERROR (EINVAL);    /* Was there a bug? */
2249 
2250         offs += sample_ptrs[sample];    /* Begin offsess + offset to DRAM */
2251 
2252         for (n = 0; n < l; n++)
2253           rec->data.data8[n] = gus_peek (offs++);
2254         rec->parm1 = n;         /* Nr of bytes copied */
2255       }
2256       return 0;
2257       break;
2258 
2259     case PM_WRITE_PATCH:        /* Writes a block of wave data to the DRAM */
2260       {
2261         int             sample = rec->parm1;
2262         int             n;
2263         long            offs = rec->parm2;
2264         int             l = rec->parm3;
2265 
2266         if (sample < 0 || sample >= free_sample)
2267           return RET_ERROR (EINVAL);
2268 
2269         if (offs < 0 || offs >= samples[sample].len)
2270           return RET_ERROR (EINVAL);    /* Invalid offset */
2271 
2272         n = samples[sample].len - offs; /* Nr of bytes left */
2273 
2274         if (l > n)
2275           l = n;
2276 
2277         if (l > sizeof (rec->data.data8))
2278           l = sizeof (rec->data.data8);
2279 
2280         if (l <= 0)
2281           return RET_ERROR (EINVAL);    /* Was there a bug? */
2282 
2283         offs += sample_ptrs[sample];    /* Begin offsess + offset to DRAM */
2284 
2285         for (n = 0; n < l; n++)
2286           gus_poke (offs++, rec->data.data8[n]);
2287         rec->parm1 = n;         /* Nr of bytes copied */
2288       }
2289       return 0;
2290       break;
2291 
2292     default:
2293       return RET_ERROR (EINVAL);
2294     }
2295 }
2296 
2297 static struct synth_operations guswave_operations =
2298 {
2299   &gus_info,
2300   SYNTH_TYPE_SAMPLE,
2301   SAMPLE_TYPE_GUS,
2302   guswave_open,
2303   guswave_close,
2304   guswave_ioctl,
2305   guswave_kill_note,
2306   guswave_start_note,
2307   guswave_set_instr,
2308   guswave_reset,
2309   guswave_hw_control,
2310   guswave_load_patch,
2311   guswave_aftertouch,
2312   guswave_controller,
2313   guswave_panning,
2314   guswave_patchmgr
2315 };
2316 
2317 long
2318 gus_wave_init (long mem_start, int irq, int dma)
     /*  */
2319 {
2320   printk (" <Gravis UltraSound %luk>", gus_mem_size / 1024);
2321 
2322   if (irq < 0 || irq > 15)
2323     {
2324       printk ("ERROR! Invalid IRQ#%d. GUS Disabled", irq);
2325       return mem_start;
2326     }
2327 
2328   if (dma < 0 || dma > 7)
2329     {
2330       printk ("ERROR! Invalid DMA#%d. GUS Disabled", dma);
2331       return mem_start;
2332     }
2333 
2334   gus_irq = irq;
2335   gus_dma = dma;
2336 
2337   if (num_synths >= MAX_SYNTH_DEV)
2338     printk ("GUS Error: Too many synthesizers\n");
2339   else
2340     synth_devs[num_synths++] = &guswave_operations;
2341 
2342   reset_sample_memory ();
2343 
2344   gus_initialize ();
2345 
2346   if (num_dspdevs < MAX_DSP_DEV)
2347     {
2348       dsp_devs[gus_devnum = num_dspdevs++] = &gus_sampling_operations;
2349       sound_dsp_dmachan[gus_devnum] = dma;
2350       sound_buffcounts[gus_devnum] = 1;
2351       sound_buffsizes[gus_devnum] = DSP_BUFFSIZE;
2352       sound_dma_automode[gus_devnum] = 0;
2353     }
2354   else
2355     printk ("GUS: Too many PCM devices available\n");
2356 
2357   return mem_start;
2358 }
2359 
2360 static void
2361 do_loop_irq (int voice)
     /*  */
2362 {
2363   unsigned char   tmp;
2364   int             mode, parm;
2365   unsigned long   flags;
2366 
2367   DISABLE_INTR (flags);
2368   gus_select_voice (voice);
2369 
2370   tmp = gus_read8 (0x00);
2371   tmp &= ~0x20;                 /* Disable wave IRQ for this_one voice */
2372   gus_write8 (0x00, tmp);
2373 
2374   mode = voices[voice].loop_irq_mode;
2375   voices[voice].loop_irq_mode = 0;
2376   parm = voices[voice].loop_irq_parm;
2377 
2378   switch (mode)
2379     {
2380 
2381     case LMODE_FINISH:          /* Final loop finished, shoot volume down */
2382 
2383       if ((gus_read16 (0x09) >> 4) < 100)       /* Get current volume */
2384         {
2385           gus_voice_off ();
2386           gus_rampoff ();
2387           gus_voice_init (voice);
2388           return;
2389         }
2390       gus_ramp_range (65, 4065);
2391       gus_ramp_rate (0, 63);    /* Fastest possible rate */
2392       gus_rampon (0x20 | 0x40); /* Ramp down, once, irq */
2393       voices[voice].volume_irq_mode = VMODE_HALT;
2394       break;
2395 
2396     case LMODE_PCM_STOP:
2397       pcm_active = 0;           /* Requires extensive processing */
2398     case LMODE_PCM:
2399       {
2400         int             orig_qlen = pcm_qlen;
2401 
2402         pcm_qlen--;
2403         pcm_head = (pcm_head + 1) % pcm_nblk;
2404         if (pcm_qlen)
2405           {
2406             play_next_pcm_block ();
2407           }
2408         else
2409           {                     /* Out of data. Just stop the voice */
2410             gus_voice_off ();
2411             gus_rampoff ();
2412             pcm_active = 0;
2413           }
2414 
2415         if (orig_qlen == pcm_nblk)
2416           {
2417             DMAbuf_outputintr (gus_devnum, 0);
2418           }
2419       }
2420       break;
2421 
2422     default:;
2423     }
2424   RESTORE_INTR (flags);
2425 }
2426 
2427 static void
2428 do_volume_irq (int voice)
     /*  */
2429 {
2430   unsigned char   tmp;
2431   int             mode, parm;
2432   unsigned long   flags;
2433 
2434   DISABLE_INTR (flags);
2435 
2436   gus_select_voice (voice);
2437 
2438   tmp = gus_read8 (0x0d);
2439   tmp &= ~0x20;                 /* Disable volume ramp IRQ */
2440   gus_write8 (0x0d, tmp);
2441 
2442   mode = voices[voice].volume_irq_mode;
2443   voices[voice].volume_irq_mode = 0;
2444   parm = voices[voice].volume_irq_parm;
2445 
2446   switch (mode)
2447     {
2448     case VMODE_HALT:            /* Decay phase finished */
2449       gus_voice_init (voice);
2450       break;
2451 
2452     case VMODE_ENVELOPE:
2453       gus_rampoff ();
2454       step_envelope (voice);
2455       break;
2456 
2457     default:;
2458     }
2459 
2460   RESTORE_INTR (flags);
2461 }
2462 
2463 void
2464 gus_voice_irq (void)
     /*  */
2465 {
2466   unsigned long   wave_ignore = 0, volume_ignore = 0;
2467   unsigned long   voice_bit;
2468 
2469   unsigned char   src, voice;
2470 
2471   while (1)
2472     {
2473       src = gus_read8 (0x0f);   /* Get source info */
2474       voice = src & 0x1f;
2475       src &= 0xc0;
2476 
2477       if (src == (0x80 | 0x40))
2478         return;                 /* No interrupt */
2479 
2480       voice_bit = 1 << voice;
2481 
2482       if (!(src & 0x80))        /* Wave IRQ pending */
2483         if (!(wave_ignore & voice_bit) && voice < nr_voices)    /* Not done yet */
2484           {
2485             wave_ignore |= voice_bit;
2486             do_loop_irq (voice);
2487           }
2488 
2489       if (!(src & 0x40))        /* Volume IRQ pending */
2490         if (!(volume_ignore & voice_bit) && voice < nr_voices)  /* Not done yet */
2491           {
2492             volume_ignore |= voice_bit;
2493             do_volume_irq (voice);
2494           }
2495     }
2496 }
2497 
2498 void
2499 guswave_dma_irq (void)
     /*  */
2500 {
2501   unsigned char   status;
2502 
2503   status = gus_look8 (0x41);    /* Get DMA IRQ Status */
2504   if (status & 0x40)            /* DMA Irq pending */
2505     switch (active_device)
2506       {
2507       case GUS_DEV_WAVE:
2508         if (SOMEONE_WAITING (dram_sleep_flag))
2509           WAKE_UP (dram_sleeper, dram_sleep_flag);
2510         break;
2511 
2512       case GUS_DEV_PCM_CONTINUE:
2513         gus_transfer_output_block (pcm_current_dev, pcm_current_buf,
2514                                    pcm_current_count,
2515                                    pcm_current_intrflag, 1);
2516         break;
2517 
2518       case GUS_DEV_PCM_DONE:
2519         if (pcm_qlen < pcm_nblk)
2520           {
2521             DMAbuf_outputintr (gus_devnum, pcm_qlen == 0);
2522           }
2523         break;
2524 
2525       default:;
2526       }
2527 
2528   status = gus_look8 (0x49);    /* Get Sampling IRQ Status */
2529   if (status & 0x40)            /* Sampling Irq pending */
2530     {
2531       DMAbuf_inputintr (gus_devnum);
2532     }
2533 
2534 }
2535 
2536 #endif
/* */
root/drivers/sound/gus_wave.c

DEFINITIONS
